cpk off
wireframe 50
define set1 *.O?' and dna
select set1
cpk 200
cartoons on
spin on
pause

resume
select all
cpk off
wireframe 50
define set2 *.OP? and dna
select set2
cpk 200
cartoons on
spin on
pause

resume
select all
cpk off
wireframe 50
define set3 *.N? and dna
select set3
cpk 200
cartoons on
spin on